                                      & \multicolumn{1}{c}{(1)}                 & \multicolumn{1}{c}{(2)}               & \multicolumn{1}{c}{(3)}               & \multicolumn{1}{c}{(4)}                & \multicolumn{1}{c}{(5)}                 & \multicolumn{1}{c}{(6)}               & \multicolumn{1}{c}{(7)}  & \multicolumn{1}{c}{(8)}  \\
                                       &                                        & \multicolumn{6}{c}{\textbf{t-test differences}}    & \multicolumn{1}{c}{}  \\
                                       & \multicolumn{1}{c}{\textbf{Control}}   & \multicolumn{6}{c}{\textbf{[p-value]}}             & \multicolumn{1}{c}{}  \\
\multicolumn{1}{l}{\textbf{Variable}}  & \multicolumn{1}{c}{\textbf{Mean/(SE)}} & \multicolumn{1}{c}{\textbf{(C)-(UI)}} & \multicolumn{1}{c}{\textbf{(C)-(S4)}} &  \multicolumn{1}{c}{\textbf{(C)-(S5)}} & \multicolumn{1}{c}{\textbf{(UI)-(S4)}} & \multicolumn{1}{c}{\textbf{(UI)-(S5)}} & \multicolumn{1}{c}{\textbf{(S4)-(S5)}} & \multicolumn{1}{c}{\textbf{F-Test}} \\ \hline \\[-2ex]
\multicolumn{9}{l}{\textbf{\textit{Panel A: Sample Definition}}}                                                                                \\ [0.5ex]  
                               Found \& surveyed at follow-up & 0.598 & 0.020 & -0.038 & -0.002 & -0.058 & -0.022 & 0.036 & 0.077 \\    & [0.019] & [0.273] & [0.074] & [0.961] & [0.005] & [0.303] & [0.090] &  \\  Traveled at follow-up & 0.073 & 0.006 & 0.008 & 0.022 & 0.002 & 0.016 & 0.014 & 0.397 \\   & [0.009] & [0.626] & [0.596] & [0.187] & [0.826] & [0.177] & [0.295] &  \\  Moved at follow-up & 0.232 & -0.021 & 0.023 & -0.004 & 0.044 & 0.017 & -0.027 & 0.070 \\   & [0.018] & [0.318] & [0.075] & [0.981] & [0.007] & [0.191] & [0.050] &  \\  Deceased at follow-up & 0.063 & -0.002 & 0.014 & -0.013 & 0.015 & -0.011 & -0.026 & 0.062 \\   & [0.009] & [0.734] & [0.218] & [0.268] & [0.058] & [0.345] & [0.011] &  \\  Was not found at follow-up & 0.035 & -0.003 & -0.007 & -0.003 & -0.004 & 0.000 & 0.004 & 0.801 \\   & [0.012] & [0.520] & [0.368] & [0.739] & [0.278] & [0.508] & [0.710] &  \\  Observations &  & 2370 & 2651 & 2425 & 2605 & 2379 & 2660 &  \\  Clinics &  & 60 & 60 & 59 & 60 & 59 & 59 &  \\   &  &  &  &  &  &  &  &  \\                                                                                                                                                                                                         \\ [-2ex]   
\multicolumn{9}{l}{\textbf{\textit{Panel B: Sample Characteristics}}}                           \\ [0.5ex]  
\addlinespace[0.75ex]                        Age of child (in days) & 155.400 & 3.393 & -3.266 & 5.739 & -6.659 & 2.346 & 9.005 & 0.272 \\    & [6.305] & [0.494] & [0.623] & [0.186] & [0.186] & [0.606] & [0.084] &  \\  Child has a vaccine card & 0.975 & 0.002 & 0.010 & 0.011 & 0.008 & 0.009 & 0.001 & 0.421 \\   & [0.008] & [0.384] & [0.039] & [0.238] & [0.460] & [0.764] & [0.906] &  \\  Observations &  & 1393 & 1639 & 1452 & 1588 & 1401 & 1647 &  \\   &  &  &  &  &  &  &  &  \\                                                                                                            [-2ex]  
                       Vaccine Card is of good quality & 0.806 & 0.021 & -0.008 & -0.053 & -0.028 & -0.073 & -0.045 & 0.236 \\    & [0.040] & [0.704] & [0.994] & [0.175] & [0.718] & [0.040] & [0.120] &  \\  Observations &  & 1078 & 1331 & 1163 & 1267 & 1099 & 1352 &  \\  Clinics &  & 60 & 60 & 59 & 60 & 59 & 59 &  \\   &  &  &  &  &  &  &  &  \\                                                                                                                                                                    [-2ex]  
                       Mother's ability to recall last vaccine & 0.825 & 0.052 & -0.041 & 0.002 & -0.093 & -0.050 & 0.044 & 0.169 \\    & [0.033] & [0.334] & [0.369] & [0.392] & [0.042] & [0.265] & [0.266] &  \\  Observations &  & 1393 & 1639 & 1452 & 1588 & 1401 & 1647 &  \\  Clinics &  & 60 & 60 & 59 & 60 & 59 & 59 &  \\   &  &  &  &  &  &  &  &  \\                                                                                                                                                                       \hline \hline \\ [-2ex]  